/*
Copyleft (C) 2005 H�lio Perroni Filho
xperroni@yahoo.com
ICQ: 2490863

This file is part of ChatterBean.

ChatterBean is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

ChatterBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with ChatterBean (look at the Documents/ directory); if not, either write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA, or visit (http://www.gnu.org/licenses/gpl.txt).
 */

package bitoflife.chatterbean.script;

/**
 * Interpreter for Beanshell scripts.
 */
// Interpreter是接口吗？？？？
public class BeanshellInterpreter implements Interpreter {
	/*
	 * Attribute Section
	 */

	/** Beanshell interpreter. */
	private final bsh.Interpreter interpreter = new bsh.Interpreter();// 这里用到了一个新的工具包？？？？

	/*
	 * Method Section
	 */

	public Object evaluate(String script) throws InterpretingException {
		try {
			return interpreter.eval(script);
		} catch (Exception e) {
			throw new InterpretingException(e);
		}
	}

	public Object variable(String name) throws InterpretingException {
		try {
			return interpreter.get(name);
		} catch (Exception e) {
			throw new InterpretingException(e);
		}
	}

	public void variable(String name, Object value)
			throws InterpretingException {
		try {
			interpreter.set(name, value);
		} catch (Exception e) {
			throw new InterpretingException(e);
		}
	}
}
